That is clearly an Arcane Nexus, and the Ceiling Cat is clearly a new kind of Doom Horror. I think the grey, undefined area at the top of the image is The Void, and it seems like Ceiling Cat the Watcher Beyond just came through.

I have this theory that all Horrors are psychic projections of cats. There's quite a bit of evidence to support this.

1: Horrors and cats can both turn up practically anywhere, without prior warning.
2: They both enjoy toying with their prey before despatching them.
3: They pay more attention to some people than others, and there's no way of telling why or changing their behaviour. Once one's taken a liking to you, that's that.

I have this theory that all Horrors are psychic projections of cats. There's quite a bit of evidence to support this.

1: Horrors and cats can both turn up practically anywhere, without prior warning.
2: They both enjoy toying with their prey before despatching them.
3: They pay more attention to some people than others, and there's no way of telling why or changing their behaviour. Once one's taken a liking to you, that's that.

I always thought of Doom Horrors as a melded creature: one combing all the worst attributes of your soon-to-be-ex wife and her attorney. It is the name that provided that inspiration.

__________________Men do not quit playing because they grow old; they grow old because they quit playing. Oliver Wendell Holmes

Conclusions
It is evident that the whole company named "Disney Pictures" has always been under control of Illwinter. The cartoon in analysis was clearly created to send subliminal messages to the growing fragile minds of innocent children in order to force them to buy the dangerous product ambiguously named "Dominions 3" (maybe an abbreviation for... "mind-dominion threshold"?) when they would have grown up.
We will soon proceed to the arrest of the individuals (aliens?) mysteriously referred to as KO and JK.